Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Uraninite from
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


03324160017407660275087.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
08635250017272017385669.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
04197550017272017426723.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
06645680017272017432292.jpg
Uraninite, etc.

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
07801580017407108757679.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
01661550017370178973404.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
07236580017370178976497.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
00346730017370178987228.jpg
Uraninite, etc.

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
05957600017407660273035.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
08635250017272017385669.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
04197550017272017426723.jpg
Uraninite

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
06645680017272017432292.jpg
Uraninite, etc.

Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Uraninite
Formula:UO2
Comments:Easily identified by its association with colorful secondary mineralization. Schooner (1955) states that: "crystals, of excellent form, ranging up to a quarter of an inch in diameter were obtained from near the surface of Collins Hill, during the early years [around 1920] of the Strickland Quarry. Wesleyan University, in neighboring Middletown, has many fine specimens. The crystals are octahedral, with cubic modifications." See http://www.mindat.org/photo-626775.html. Columbite-(Fe) and sphalerite were associated.
Habit:octahedral to irregular grains
Colour:black
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Albite7
- var Cleavelandite3
Uranophane4
Spodumene3
Quartz3
Wodginite3
Meta-autunite2
Fluorapatite2
Microcline1
Columbite-(Fe)1
Data
Mineral Data:Click here to view Uraninite data
Locality Data:Click here to view Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (9 photos)
Data Identifiers
Mindat Occurrence Record ID:34916
Long-form Identifier:1:3:34916:7
GUID (UUID V4):0
Nearest other occurrences of Uraninite
0.1km (0.1 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
1.6km (1.0 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
3.0km (1.8 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
3.4km (2.1 miles) ⓘBordonaro Quarry, Portland, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘCase Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
3.9km (2.4 miles) ⓘCase Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA
4.0km (2.5 miles) ⓘRiverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
4.1km (2.6 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
4.2km (2.6 miles) ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA
References
Ralph Lieser of Pappy’s Beryl Shop, East Hampton
and Howard Pate of Fluorescent House, Branford, Connecticut.
Schooner, Richard (1955) 90 Minerals from 1 Connecticut Hill. Rocks & Minerals, 30 (7-8). 351-358 doi:10.1080/00357529.1955.11767837
Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner
 
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